CVEN3501 Assignment 2 CVEN3501 - WATER RESOURCES ENGINEERING ASSIGNMENT 2 ASSIGNMENT DUE: 21st MAY 2014, 5:00PM Please submit in box marked “Fiona Johnson” on the 3 rd floor opposite Room 309 in the Civil and Environmental Engineering Building, with a cover sheet that has your name, student number and workshop class. Ensure that you show your working and/or summaries of the data that you have used for the calculations. State any assumptions that are required. Penalty for late submission is 10% per day. You have been asked to determine design flows for a project located in Thora, NSW (Latitude = -30°26', Longitude = 152° 47', Elevation = 50 m AHD). The location shown in Figure 1. The flows from two catchments are to be considered. The first is the full Bellinger River catchment that drains to Thora. There is a streamflow gauge located on the river at Thora. The second catchment is a local sub-catchment draining to the project site. The locations of the main catchment and sub-catchment are shown in Figure 2. Part 1 (10 marks) a) Using the recorded flow data at the Thora Gauge (spreadsheet on Moodle and location shown on Figure 2) undertake a Flood Frequency Analysis for the Bellinger River at Thora catchment to determine the peak flow in the 2% AEP flood event. b) On the log paper (available from Moodle) plot the observed Annual Maximum Series flood values and the design values for the 50%., 20%, 10%, 5%, 2% and 1% AEP events. (Note if you choose do this plot in Excel you must make sure that you use a probability scale for the x-axis. This is different from a log scale.) Part 2 (5 marks) A bridge is to be constructed at the outlet of a 27.97 km 2 sub-catchment at Thora. This bridge is to be designed for a 2% AEP event. Using the Probabilistic Rational Method, what flow should the bridge designers use? Part 3 (5 marks) There are three main software programs used by industry to analyse flood flow in catchments. The programs are: XP-RAFTS, RORB and WBNM. User manuals for each of these programs have been uploaded to Moodle along with some other resources. Based your knowledge from the course lectures, the resources